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Genome-wide essential gene identification for Shiga toxin-induced cell death using CRISPR/CAS9 screening system

ABSTRACT: Genome-wide essential gene identification for Shiga toxin-induced cell death using CRISPR/CAS9 screening system

PROVIDER: PRJNA480005 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7478820.fastq.gz	Fastqsanger.gz
	SRR7478821.fastq.gz	Fastqsanger.gz
	SRR7478814.fastq.gz	Fastqsanger.gz
	SRR7478815.fastq.gz	Fastqsanger.gz
	SRR7478816.fastq.gz	Fastqsanger.gz

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Genome-wide essential gene identification for Shiga toxin-induced cell death using CRISPR/CAS9 screening system with Vero cells

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Genome-wide essential gene identification for Shiga toxin-induced cell death using CRISPR/CAS9 screening system with Vero cells

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Effects of E. coli Shiga toxin on the gene expression profile of human microvascular endothelial cells

Project description:Changes in endothelial phenotype induced by E. coli-derived Shiga toxins (Stx) are believed to play a critical role in the pathogenesis of hemolytic uremic syndrome. Stx inactivate host ribosomes, but also alter gene expression at concentrations that minimally affect global protein synthesis. The effect of Stx on the gene expression profile of human microvascular endothelial cells was examined using the Affymetrix HG-U133A platform. Data were processed using 13 different methods and revealed 369 unique differentially expressed genes, 318 of which were up-regulated and 51 of which were down-regulated. These studies implicated activation of the CXCR4/CXCR7/SDF-1 chemokine pathway in Stx-mediated pathogenesis. Primary human dermal microvascular endothelial cells were treated with vehicle or Shiga toxin (10 fM, 24 h, n = 6) and changes in steady-state mRNA levels were determined by hybridization to Affymetrix HG-U133A arrays

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Genome-wide essential gene identification for SubAB toxin-induced cell death using CRISPR/CAS9 screening system

Project description:Isolation of genes whose knockout confer resistance to SubAB-Induced cell death

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Functional Dissection of the Retrograde Shiga Toxin Trafficking Inhibitor Retro-2

Project description:The retrograde transport inhibitor Retro-2 has a protective effect on cells and in mice against Shiga-like toxins and ricin. Retro-2 causes toxin accumulation in early endosomes, and the relocalization of the Golgi SNARE protein syntaxin-5 to the endoplasmic reticulum. The molecular mechanisms by which this is achieved remain unknown. Here, we show that Retro-2 targets the endoplasmic reticulum exit site component Sec16A, affecting anterograde transport of syntaxin-5 from the endoplasmic reticulum to the Golgi. The formation of canonical SNARE complexes involving syntaxin-5 is not affected in Retro-2-treated cells. In contrast, the interaction of syntaxin-5 with a newly discovered binding partner, the retrograde trafficking chaperone GPP130, is abolished, and we show that GPP130 must indeed bind to syntaxin-5 to drive Shiga toxin transport from endosomes to the Golgi. We thereby identify Sec16A as a druggable target, and provide evidence for a non-SNARE function for syntaxin-5 in interaction with the retrograde cycling protein GPP130. a) Clickable Retro-2 pulldown. To identify protein target of Retro-2.1, providing the first steps to explain effects of Retro-2 on inhibition of STxB retrograde trafficking from endosomes to Golgi. b) GFP-STX5 pulldown. To find interactors of STX5, to build a hypothesis to explain the affect of Retro-2-inhibited anterograde trafficking of STX5 to Golgi, which in turn inhibits STxB retrograde transport from endosomes to Golgi. c) GFP-Sec16A pulldown. The aim of this proteomics assay is to show the effects of Retro-2 on the Sec16A interactome. Results show the differential effects of Retro-2 treatment on the Sec16A interactome, giving insight into the mechanism by which Retro-2, via Sec16A, specifically affects the anterograde trafficking of Syntaxin-5.

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